Shoe and heel drilling machine



Feb. 25, 1930. F. E. BERTRAND I SHOE A'ND HEEL DRILLING MACHINE Filed Jan. 11, 1928 Patented Feb. 25, 1930 i 'u irEosTATEs PATENT OFFICE r'nnnnnro n. Beaten-Ann; or LYNN, MASSACHUSETTS, ASSIGNOR r uivrrnnsnon .MACHINEBY conronarronor rarnnson, NEW JERSEY, A CORIEORATION' OF NEW JERSEY SHOE AND HEEL DRILLENG MACHINE 7 Application filed January 11, 1928. Serial No. 245,966.

7 "This invention relatesto drilling machines and particularly to drilling machines of the type employed to drill through the heel seat of a shoe into a heel which has been applied.

Jsc'ribed; and'claimed in my copending application Serial No.',54,046, filed Sept. 2, 1925,

a. development, of and improvement upon that machine.

' Machines of this kind are providedwith a drill which is a dapte'dftovbe fed manually downward through .a previously formed guide-holein-a lastupon which the shoe is mounted, and to drill through the heel seat of the shoe, and into the heel,a hole for the i reception of ascrewvfastener which is later j to be inserted and tightened for the purpose heel tightly together, Itis essential that the fastener receiving hole be drilled deeply of clamping and hol'ding'the last, sho'e'and enough into the heel to permit the fastener to bescrewed 'far enough into the heel to hold the latter securely, and it'is equally important thatthe hole shall not be deep enough to weaken the heel materially or approach too closely tov anyof the surfaces of 7 the heel.

[Inasmuch as the drillenterslthefwork at f the bottom of a deep guide hole in the last j it is impossible to determine by inspection how the drilling of the hole is progressing "wand the'pla ce on the work where the holeis tobe drilled is entirely conoe'aled from view,

1 and the use of any depth gage dependent "upon co-operationswith the work makes it necessary for the: operator to rely upon his sense of touch to-determine when thehole ,is'finished. Since lasts are not uniform in r helght, theme of any gaglng means 00- ffop'erating with the last is liable to result in [inaccuracy and'the production of non-uniform holes. It will, therefore, be realized that'there is a problem of substantial diffi- 'cultypresented.v L

means for positively and definitely determining thepoint to which the hole shall be drilled in the work.

In the illustrated embodiment of the invention the point to which the hole is drilled is determined by an adjustable stop cooperating with an extensible shaft by which the V drill is rotated and an important feature. of v and the present inventionis in the nature of 10 ing indicia to aid in determining the adjustment and co-operating with locking means which operates. positively to preserve the settingto which the stopis adjusted.

Still another feature of the invention re sides in the provision upon the indicator of one or more additionalindicia relating to the depth of the hole to be'drilled and usable to determine the correct adjustment of the drill in a holder in whichit is secured and through which movement is imparted to it.

The foregoing and other features and advantages of the invention will be better understood and appreciated by reading the following, detailed description of one embodiment thereof in connection with the, accompanying drawings, in which,

. Fig. 1 is a view in side elevation, partly insection, of a structure embodying the invention;

Fig.2 is a view of the same in front ele vation; and

Fig. 3 is a-face view of the indicator upon an enlarged scale.

Referring now to the drawings, 10 indicates the housing whichencloses the gearing and supports the pendentdrill shaft, in a machine of the typeidisclosed in my prior application, hereinbefore mentioned.

The drill shaft, which is extensible ver- I tically toper-mit the drill tobe fed into the work, comprises two telescoping sections 12 and '14, a'universal joint 16, a shaft section 18, and. a chuck 20 having a set screw 22 to secure the drill 24. The shaft section 18 is surroundedby a handle 26 adapted to be 7 grasped by the operator, who manipulates the drill to feed it into and withdraw it support, upon which a lasted shoe' and heel in. the. shoe and i, fed downward through the heel. seat of the shoe into the heel, as shown I adjusting the drill 24 in its chuck 20, the

there is provided a rigid stop38 surrounding which the saidshaft section is freely slidable. I The shaft section :14 is provided at its upper 32 are sustained, is indicated at'34t. This work support is normally stationary and the drill, which is rotated continuously, is insertedthrough a guide hole in the last 36 which is in Fig. 1. Iniorderaccurately todetermine the depth to which the, drill .24. shall penetrate the heel the movable drill shaft section 14 and through end-.with a collar 4:0..adapted to engage the [stop 38,. to limitpositivelyand definitely the a ,do.wnwa rd .inovementoff this section of the Lkdrill shaftand, consequently, of the drill.

. The stop. 38. is secured to the lowerend of a rack ,bar ,42 which; is adj ustable vertically ,in a. stationarygu'ide .44. The upper portion ,of the/lack bar .42is provided with teeth .46, which, mesh with a pinion 48-mounted upon a rotation,ofgtheindicator "52 will cause the stop -38 to beiadjusted-vup. or :downand, in

0 order to secure the stop immovablyin thede- Y i sired, position of adj ustment,"the peripheryof the indicator 52 is, provided, with notches 54 l {adapted to/co-o'perate with astationary pin tolockthelindicatoragainst rotation. The

,shaft 517is slidab-le longitudinally through a ,suflicient distance topermit the indicator tobc disengaged from the pin 50 when it is desired 'to'ch'ange the adjustment and a spring .58

U surrounding the indicator shaft serves to move the mdicator d alinto engagement with "the pin 50 whenthe adjustment is, aCGOm plished.

The

groups of indicia; One of thesegroups of v.indicia relates to the thickness ofthe work to be operatedupon. 111, theillustrated ,ap

paratus this group of indicia, consists of the to the various heights of heels in which holes are to be drilledh gSinceitis customary to:

. .d esignategth e height of a heel inflighthsof inch: t netch s 410 th s g up I ar s indicator 52 is provided with two; groups of notches and two corresponding the heel to be operated upon. 'For example, V

as shown in Figs. 2 and 3, theindicator is set at 16, this setting being correct for a 16/ 8,

or twoinch, heel. It will be apparent from an inspection of the drawings that the higher stop 38 will be adjusted, which'is" consistent the heel thehigher theposition to which the with the requirement that holes be drilled to r the samepdepth in allheels.

The secondvgroup of notches inthe periphery of the indicator, one of'whichis indicated process beingto set theindicator v52 so that the notch 8 for example, is engagedbythe pin 50, if it isdesired to drill ahole one-half inch deep, and then, with the collar 40 resting upon the stop 38, the :drill is so adjustedin its chuckthat the point of the-drill rests upon the surface. of. the work support 34,- afterwhich the set screw 22 is tightened. f The drill V will now drill achole one-halfrinch deep in any heel'placed upon the work-support provided the indicator, 52' is set in accordance with. the height of that particularheel. In. the ordinary-Luseof the apparatus the drill will be set in thechuckto drill intothe work to: a dep.th-,of, .say, one-half or five- .shaft51 tothe outer endof whichissec'ured a'cdial-indicaton52. It willbe apparent-that eighths .of an inch, and left/that way indeatedupon.

=Having thusdescribedmy invention, what I Patent of the United States is c 1. In ashoe and heeldrilling machine, the combination ofa rotating drill carrier which claim as new and desire to secure by Letters is manually movable to feed a d'rillcinto,.-the' work, a rigid, adjustable stop adaptedto be engaged by an element of-said carrier to limit the feeding movement, an. indicator bearing indiciarelating toithe'thickness .of the work for which the stop is to be adjusted,,and positive movement transmittingconnections. be

tween the indicator and'thestop. 1.

, 2. In a shoe and heel drilling machine, the

combination of a rotating drill carrier. which is manually movable to feed a. drill: into the work, a rigid, adjustablestop adaptedto be, engaged by anelement of saidic'arrier to limit numbers from 8 to 20, inclusive, which relate,

thefeedingmovement, an indicator bearing f for'which the stop is to-beadjusted positive movement transmitting connections. between;- the indicator'and the stop,.and zmeansforn lockingthe indicator in adjusted position.

1 In ajshoe and heel drilling machine, the

indicia' relating to the thickness ofthe work 7 work, a rigid. adjustable stop adapted to be engaged by an element of said carrier to limit the feedingv movement, an indicator bearing an indicator connected to the stop, indicia on the indicator relating to the thickness of the work to be drilled, and another indicium on the indicator relating to the depth of the hole to be drilled, said indicium being usable to determine the proper adjustment of the drill in the holder.

In testimony whereof I have signed my name to this specification. I

FREDERIG E. BERTRAND. 

